ur not really banned if ur 48hr bann is over and u get and error i get it to there is a way to fix this. this is how to fix cannot connect to server error

* Disable any firewall or security features on your router.
you have to type ur ip or gateway in an internet brower to access ur router

* Set port forwarding on your router to the IP address of your Xbox 360. This game uses port 3074 (UDP/TCP).

Additionally Xbox Live requires ports 80, 53 (TCP) and 88, 53 (UDP).

* Place your Xbox 360 into the DMZ of your router.

* If both fail, disconnect your router and try the game. If it works regularly at this point something about your router may not be completely compatible with the specific needs of this game. Check with your router manufacturer and Microsoft's Xbox Live Networking Help page for additional steps that may need to be done to resolve the issue you are having.

* You can also check the following link to verify that you have an Xbox Live compatible router.

NOTE: If setting port forwarding or DMZ helps your connection issue, you may want to assign your Xbox 360 a static IP address within your home network. This can help to ensure that the configurations you made do not need to be done again.

NOTE: Many broadband internet modems are coming with routing capabilities built in. Please contact your internet service provider to determine if your internet modem has an integrated router. If it does, they should be able to assist you with the steps above for setting up your router.
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* Once you have verified that your network setup is not the cause of the issue, try the following

- Try connecting to a different server. Some servers may have other players connected to them that you do not have an optimal connection with. In most games this is accomplished by backing out to the main menu and then selecting multiplayer again. From there you can try connecting to another online game.

- Run the Xbox Network Self Test to see how strong your NAT is currently set to. Turn on your Xbox 360 without a disc inside and go to "My Xbox", select "System Settings"-> "Network Settings" then choose "Test Xbox Live Connection" and let the test run. Once the test is completed you will be notified if there is an issue with your connection. If you select "More Info" you will be given information about your NAT type and some steps to resolve any issues with your connection.